Lower commissions resulted in significantly higher home sales.
Obviously this would benefit the economy:

A one-half reduction in the commission rate leads to a 73%
increase in the number of houses each agent sells and benefits
consumers by about $2 billion. House price appreciation in the
first half of the 2000s accounts for 24% of overall entry and a
31% decline in the number of houses sold by each agent. Low cost
programs that provide information about past agent performance
have the potential to increase overall productivity and generate
significant social savings.

There are other benefits associated with lower or flexible
commissions that are not captured by our model... For example,
lower commissions reduce transaction costs, which might lead to a
more liquid housing market, improved asset allocation, and better
housing consumption. Flexible commissions also provide a channel
for consumers to choose services tailored to their
preferences.